Use mysqldump tool to backup and restore mysql data

1. Use mysqldump tool to backup

1.1 Detailed explanation of mysqldump command:

Common parameters:

-u   登录的用户，默认使用root
-p   登录密码，默认为空密码
-h   MySQL服务器的IP地址（默认连接localhost）
-P	 MySQL连接端口（默认为3306）
-A   全备，备份所有的数据库
-B   备份指定的库

1.2 Full equipment:

1.2.1 Command format:

mysqldump -u用户 -p密码 -A > 备份的路径

1.2.2 Examples

Back up all databases in MySQL to the /home/database_backup directory

创建备份目录
mkdir /home/db_back

全备
mysqldump -u用户 -p密码 -A > /home/db_back/all.sql

1.3 Backup multiple databases

1.3.1 Command format:

mysqldump -u用户 -p密码 -B 要备份的数据库 > 备份的路径

1.3.2 Examples

Back up the baidu, jingdong, and alibaba databases in MySQL to the /home/database_backup directory

mysqldump -uroot -p456 -B baidu jingdong alibaba  > /home/db_back/bja.sql

1.4 Backup table: backup dupan table under baidu library

1.4.1 Command format:

mysqldump -u用户 -p密码 库名 表名 > 备份的路径

1.3.2 Examples

Back up the dupan table under the baidu database in MySQL to the /home/database_backup directory

mysqldump -uroot -p456  baidu dupan > /home/db_back/dupan.sql

1.5 Restore data

1.5.1 mysql command recovery

Restore the specified database

mysql -uroot -p456 < /home/db_back/baidu.sql

Restore the specified table under the specified database, when restoring the table, you must specify the database to be restored

mysql -uroot -p456 baidu < /home/db_back/dupan.sql

1.5.2 source statement recovery

Restore all databases

MariaDB [(none)]> source /home/db_back/all.sql;

Restore the specified table under the specified data

MariaDB [test]> use baidu;
Database changed

MariaDB [baidu]> source /home/db_back/dupan.sql;